There’s something undeniably comforting about a classic grilled cheese sandwich. The gooey cheese, the crunchy, buttery bread, and the warmth that envelops you with every bite make it a beloved dish. But what if we could elevate this timeless favorite? Enter the Roasted Cauliflower Grilled Cheese—a delightful twist that combines the rich flavors of roasted cauliflower with creamy, dreamy cheeses, all nestled between slices of wholesome bread. This recipe is not just a meal; it’s an experience that will leave you savoring every bite while feeling nourished and satisfied.
Why This Roasted Cauliflower Grilled Cheese Stands Out

This Roasted Cauliflower Grilled Cheese is a culinary celebration of textures and flavors. The roasted cauliflower adds a deliciously nutty taste, while the combination of Gouda and Creamy Havarti creates a melt-in-your-mouth effect that’s hard to resist. Plus, with the addition of fresh arugula and a zingy garlic-mustard mayonnaise, each bite is bursting with freshness. It’s a perfect blend of comfort food meets healthy eating, making it a fantastic choice for lunch or a light dinner.
Ingredient List

- 1 small head of cauliflower, sliced into flat, 3/8-inch-thick pieces
- 1 small yellow onion, sliced into 1/4-inch-thick rounds
- 1 tablespoon olive oil
- Salt and freshly ground black pepper to taste
- 2 tablespoons butter, softened
- 4 slices whole-grain bread, such as Eureka! Organic Bread
- 2 slices Arla Dofino Gouda cheese or 2 ounces, grated
- 2 slices Arla Dofino Creamy Havarti cheese or 2 ounces, grated
- 1/3 cup baby arugula
- 1/4 cup light mayonnaise
- 1 small garlic clove, minced
- 2 teaspoons whole grain mustard
- 2 teaspoons fresh lemon juice
Essential Tools for Success

- Sheet pan: For roasting the cauliflower and onions to perfection.
- Spatula: To flip the sandwiches without losing that gooey cheese.
- Skillet: A non-stick skillet works best for grilling the sandwiches.
- Knife: For slicing the ingredients and spreading the butter.
Roasted Cauliflower Grilled Cheese in Steps
Step 1: Preheat the Oven
Preheat your oven to 425°F (220°C). This high temperature will ensure that your cauliflower and onions roast beautifully.
Step 2: Prepare the Vegetables
On a large sheet pan, arrange the sliced cauliflower and onion rounds. Drizzle with olive oil, and sprinkle generously with salt and pepper. Toss to coat well.
Step 3: Roast the Vegetables
Place the sheet pan in the preheated oven and roast for about 20-25 minutes, flipping halfway through, until the vegetables are golden and tender. Remove them from the oven and set aside.
Step 4: Mix the Garlic-Mustard Mayonnaise
In a small bowl, combine the light mayonnaise, minced garlic, whole grain mustard, and fresh lemon juice. Stir until well mixed, then add salt and pepper to taste.
Step 5: Assemble the Sandwiches
Spread a layer of softened butter on one side of each slice of whole-grain bread. On the unbuttered side, spread a generous amount of the garlic-mustard mayonnaise. Layer the roasted cauliflower, onion, Gouda, and Creamy Havarti cheese on top of the mayonnaise. Top with fresh baby arugula and another slice of bread, buttered side facing out.
Step 6: Grill the Sandwiches
Heat a non-stick skillet over medium heat. Carefully place the assembled sandwiches in the skillet. Cook for about 3-4 minutes on each side, or until the bread is golden brown and the cheese is melted.
Step 7: Serve and Enjoy
Once grilled to perfection, remove the sandwiches from the skillet. Let them cool for a minute, then slice in half and dive into that ooey-gooey goodness. Enjoy your Roasted Cauliflower Grilled Cheese with a side salad or your favorite soup!
Ingredient Flex Options
- Cheese: Swap out Gouda and Havarti for your favorite melty cheese like mozzarella or cheddar.
- Bread: Use gluten-free bread if you need a gluten-free option.
- Greens: Replace arugula with spinach or kale for a different flavor profile.
- Condiments: Experiment with different mustards or add a dash of hot sauce to the mayonnaise for some heat.
Steer Clear of These
- Overcooking the vegetables: Aim for tender and caramelized, not mushy.
- Using stale bread: Fresh bread makes all the difference for a perfect grilled cheese.
- Skipping the mayo mix: The garlic-mustard mayonnaise adds depth; don’t omit it!
Cooling, Storing & Rewarming
If you have leftovers (which is rare!), allow the sandwiches to cool completely before storing them in an airtight container in the refrigerator. They will keep for up to 2 days. To reheat, place them in a skillet over low heat, covering with a lid to help melt the cheese without burning the bread.
Ask & Learn
Can I freeze the Roasted Cauliflower Grilled Cheese?
While it’s best fresh, you can freeze the assembled sandwiches before grilling. Wrap them tightly in plastic wrap and then foil. When you’re ready to eat, thaw and grill as normal.
What can I serve with the sandwiches?
This grilled cheese pairs wonderfully with a simple side salad, tomato soup, or even a bowl of vegetable broth for a cozy meal.
How can I make it vegan?
To make a vegan version, substitute the cheese with plant-based cheese alternatives and use vegan butter for grilling. The mayonnaise can be replaced with a vegan mayo option.
Can I use frozen cauliflower?
While fresh cauliflower is recommended for roasting, you can use frozen cauliflower. Just be sure to thaw and pat it dry before roasting to avoid excess moisture.
Make It Tonight
If you’re looking to shake up your weeknight dinner routine, this Roasted Cauliflower Grilled Cheese is the answer. With its simple ingredients and straightforward steps, it’s a recipe that can be whipped up in no time. Plus, it’s a delightful way to incorporate more veggies into your meals without sacrificing flavor. Trust me, once you take that first bite, you’ll be hooked!
This Roasted Cauliflower Grilled Cheese not only satisfies your comfort food cravings but also offers a nutritious twist that makes you feel good about what you’re eating. So, gather your ingredients, fire up that skillet, and prepare to indulge in a grilled cheese experience like no other. Enjoy every melty, cheesy bite!

Roasted Cauliflower Grilled Cheese
Ingredients
- 1 small head cauliflower sliced into flat, 3/8-inch-thick pieces
- 1 small yellow onion sliced into 1/4-inch-thick rounds
- 1 tablespoon olive oil
- to taste salt
- to taste freshly ground black pepper
- 2 tablespoons butter softened
- 4 slices whole-grain bread such as Eureka! Organic Bread
- 2 slices Arla Dofino Gouda cheese or 2 ounces, grated
- 2 slices Arla Dofino Creamy Havarti cheese or 2 ounces, grated
- 1/3 cup baby arugula
- 1/4 cup light mayonnaise
- 1 small garlic clove minced
- 2 teaspoons whole grain mustard
- 2 teaspoons fresh lemon juice
Instructions
- Preheat your oven to 425°F (220°C). This high temperature will ensure that your cauliflower and onions roast beautifully.
- On a large sheet pan, arrange the sliced cauliflower and onion rounds. Drizzle with olive oil, and sprinkle generously with salt and pepper. Toss to coat well.
- Place the sheet pan in the preheated oven and roast for about 20-25 minutes, flipping halfway through, until the vegetables are golden and tender. Remove them from the oven and set aside.
- In a small bowl, combine the light mayonnaise, minced garlic, whole grain mustard, and fresh lemon juice. Stir until well mixed, then add salt and pepper to taste.
- Spread a layer of softened butter on one side of each slice of whole-grain bread. On the unbuttered side, spread a generous amount of the garlic-mustard mayonnaise. Layer the roasted cauliflower, onion, Gouda, and Creamy Havarti cheese on top of the mayonnaise. Top with fresh baby arugula and another slice of bread, buttered side facing out.
- Heat a non-stick skillet over medium heat. Carefully place the assembled sandwiches in the skillet. Cook for about 3-4 minutes on each side, or until the bread is golden brown and the cheese is melted.
- Once grilled to perfection, remove the sandwiches from the skillet. Let them cool for a minute, then slice in half and dive into that ooey-gooey goodness. Enjoy your Roasted Cauliflower Grilled Cheese with a side salad or your favorite soup!
Equipment
- Sheet Pan
- Spatula
- Skillet
- Knife
Notes
- You can swap Gouda and Havarti for your favorite melty cheese like mozzarella or cheddar.
- Use gluten-free bread if you need a gluten-free option.
- Allow leftovers to cool completely before storing them in an airtight container in the refrigerator.
